BISMUTH SULFIDE PARTICLES, METHOD FOR PRODUCING SAME, AND APPLICATION OF SAME
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United States of America Patent
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Issued Date -
May 16, 2024
app pub date -
Mar 18, 2022
filing date -
Apr 1, 2021
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Abstract
The present invention addresses the problem of realizing bismuth sulfide which readily reflects infrared light and which has a degree of blackness that is equal to or greater than that of carbon black. The present invention pertains to bismuth sulfide particles which include aggregated secondary particles in which primary particles are aggregated, and in which the cumulative 50% diameter (D1) in a cumulative volume distribution, as measured by a laser diffraction/scattering particle size distribution measuring device is 0.2 μm to 10 μm, inclusive. Included is a step in which a bismuth compound and a sulfur compound are heated at 30° C. to 100° C., inclusive, in a dispersion medium in the presence of a protective agent.
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